Interior lights/door switch query

[Malc_R]

Hi all

I wonder if you can help me with an electrical query around the door courtesy switch and the interior/puddle/T-bar lights for Mk 2 1976 that is driving me mad.

As I understand it, opening one of the doors should bring on that door's puddle light, the correct side console light to light the footwell , and one bulb of the T-Bar light. Looking at the wiring digrams in the Repair Operations Manual, I can see that this is all controlled from the 'purple'-based set of wires yet I cannot get mine to operate according to the description and the wiring.

The wiring diagram shows the door courtesy switch as having two wires connected - purple (+12v) and purple/red (for drivers side) . Opening the door connects the two together and 'makes' the circuit, the purple/red goes to the big switch on the console which feeds the aforementoined drivers-side lights.

However, when I look in my car, the door courtesy switch has only a single wire, which completes a circuit to earth when the door is opened. There is no second terminal on the door courtesy switch, and a look in the Rimmer's catalog shows a switch identical to mine with the single terminal only. The bizarre thing is that the wiring loom in the A-post area does not have a spare wire looking as though it needs a 'terminal' to attach to.

Do I have the wrong door switch ? Is the reality of 70's 'British Leyland' wiring different to that set out in the diagrams ?

Any suggestions as to how I can get it correct gratefully received.

Thanks in advance

Malcolm R

[jleyton]

Don't worry, you've got the correct system for a later car - the only problem is that there was never an official wiring diagram

I've got chapter and verse on this somewhere but I'm just going out now. If you do a search you should find everything but if nobody else has answered - I'm sure they will - by the time I get back tomorrow I'll dig out the info for you. it's all quite straight forward really

Cheers

Julian

[jleyton]

just found diagram - it's also somewhere in the SOC technical notes:Interior light detail.jpg

[brian0443]

Following Julian's posting.....Page 215 in the SOC Technical notes. Members section of the main website.
Brian

[Bob Heritage]

The Mk1 switch was positive feed, thus two terminals. The Mk2 switch is switched negative / earth

[Malc_R]

Thanks, Gents , for such a swift and accurate response. I now know what I am aiming for !!

[Guest]

I had the same query last week when I was trying to find out why the right hand puddle light came on, but the footwell and T bar lights did not. The ROM diagrams just confused me because as stated, here is only one wire . It turned out that the central console switch was faulty and all the contacts were not being made. The 3 lights are fed from there. Haven't fixed it yet, but just moving the switch a midget's whatnot has temporary made the contacts.

[GTJones]

Worth giving the switch a clean with a good electrical switch cleaner, mine was also a bit dodgy but a good spray and a couple of on/off movement got it working again fine.

Gary

I had the same query last week when I was trying to find out why the right hand puddle light came on, but the footwell and T bar lights did not. The ROM diagrams just confused me because as stated, here is only one wire . It turned out that the central console switch was faulty and all the contacts were not being made. The 3 lights are fed from there. Haven't fixed it yet, but just moving the switch a midget's whatnot has temporary made the contacts.

[Westfaling]

Has anybody found a source of replacement Mk 1 Door switches? Alternatively has anyone use a different switch? like the brake light switch?
Nick
(Thought I'd re-energise an older post rather than starting afresh)

[elvimto]

Nick,
I think Paddocks has the two pole switch for the Mk 1 I bought some from them the only diffference is the plunger is a bit short but I glued a bit of rubber to the frame and it works just fine.

cheers Stuart

[pcoleman]

martin at just triumph may have some MK1 switches lying around.

peter

[Westfaling]

Guys
Thanks I just ordered a pair from Paddocks
Nick

[jakesmig]

Has anybody found a source of replacement Mk 1 Door switches? Alternatively has anyone use a different switch? like the brake light switch?
Nick
(Thought I'd re-energise an older post rather than starting afresh)

Spooky timing on this subject. Last week I got 2 door switches from Robsport to at last get down to fixing the interior lights (only taken 5 years). In my ignorance I didn't let them know I had a Mk1 and they delivered bog standard switches, no problem, fitted a relay into the system and now they work just fine.
for anyone interested,
Purple to 30
Purple red to 87
bridge from purple to 85
Door switch earth to 86.
John.